JPH11173641A - Duct type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid a duct from being bent or the use of an elbow or a chamber in an air outlet side and suppress the whole height (depth) of an air outlet part including the duct to low height. SOLUTION: A duct type air conditioner comprises an air conditioner main body, an air outlet part A for supplying conditioned air from the air conditioner main body to a room and a duct 7 with a circular section for connecting the air outlet part A to the air conditioner main body. The air outlet part A has an air outlet 1 with an air outlet opening 1a formed and a ventilation casing 2 for guiding the conditioned air to the air outlet 1. The ventilation casing 2 has a substantially cylindrical duct connecting part 2a and the axis of the duct connecting part 2a is perpendicular to the supplying direction F of the conditioned air from the air outlet 1. Both the right and left ends of the duct connecting part 2a are provided with both end connecting parts 4 for connecting the duct 7 in the axial direction of the duct connecting part 2a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct type air conditioner in which an air conditioner body and an outlet are connected by a duct, and more particularly to a duct type air conditioner having an improved outlet or duct structure.

[0002]

2. Description of the Related Art Conventionally, in a duct type air conditioner in which an air conditioner main body and a blowout portion are connected by a duct, a structure shown in FIG. 8 or FIG. 9 is used as a structure on a blowout portion side.

[0003] That is, in FIG. 8 or 9, the outlet of the duct type air conditioner includes an outlet 1 having an outlet 1 a and a ventilation casing 20 for guiding conditioned air to the outlet 1. And The ventilation casing 20 is made of a material mainly composed of a sheet metal on which a heat insulating material is stuck, styrene foam, or the like.

A variable air volume damper 3 is provided on the side of the air outlet 1 in the ventilation casing 20. Also,
The ventilation casing 20 extends in the opposite direction along the blowing direction (arrow F direction) of the conditioned air from the outlet port 1, and has a duct connection portion 24 formed at an extended end thereof for connecting the duct 7. I have.

[0005]

The conventional duct type air conditioner as described above has the following problems.
That is, depending on the structure of the house in which the air conditioner is installed, the duct 7 extending in a direction substantially perpendicular to the direction F of the conditioned air from the outlet port 1 must be connected, for example, due to restrictions on duct routing. Often not. In such a case, the duct 7 is bent by approximately 90 degrees (FIG. 8), an elbow 22 is provided (FIG. 9), and the duct 7 is connected to the duct connecting portion 2 by means such as using a branch chamber.
4 is connected.

However, when the duct 7 is bent, there is a problem that the air-conditioning capacity is reduced due to a pressure loss.
When a chamber or a chamber is used, there is a problem that the cost is increased and the installation operation is complicated. In addition, due to restrictions on the height (depth) a, b, etc. of the entire blowing section shown in FIGS. 8 and 9, it may be necessary to partially remodel the house.

The present invention has been made in view of the above points, and avoids bending of a duct and use of an elbow or a chamber on the blowing side, and the height (depth) of the entire blowing section including the duct. It is a main object of the present invention to provide a duct type air conditioner capable of reducing the size of the air conditioner.

[0008]

The first means comprises an air conditioner main body, an air outlet for blowing air-conditioned air from the air conditioner main body into a room, the air outlet and the air conditioner main body. And a duct connecting the air outlet and the air outlet, wherein the outlet has an outlet and a ventilation casing for guiding conditioned air to the outlet. In contrast, the duct type air conditioner is characterized in that the duct is connected from a direction substantially orthogonal to a direction in which the conditioned air is blown from the outlet.

According to the first means, the duct can be connected to the ventilation casing of the blow-out portion from a direction substantially perpendicular to the direction of blowing the conditioned air from the blow-out portion. When connecting ducts extending in a direction substantially perpendicular to each other, there is no need to bend the duct on the side of the blow-out portion or use an elbow or a chamber. Further, the height (depth) of the entire blowout portion can be reduced as compared with the conventional case where the ventilation casing extends along the blowout direction of the conditioned air from the blowout portion.

[0010] A second means is the first means, wherein the ventilation casing of the blow-out portion is connectable to the duct from a plurality of directions substantially orthogonal to a blow-out direction of the conditioned air from the blow-out portion. Is what it is.

According to the second means, in the first means, the degree of freedom of installation of the outlet and the duct can be further increased.

According to a third aspect, in the first or second aspect, the ventilation casing of the blow-out portion is capable of connecting a plurality of types of ducts having different cross-sectional shapes.

According to the third means, in the first or second means, a plurality of types of ducts having different cross-sectional shapes can be connected simultaneously or selectively, and the installation of the blowout portion and the duct and the installation of the duct can be performed. The degree of freedom in the selection of the type can be improved.

According to a fourth aspect, in any one of the first to third aspects, the ventilation casing connects a duct connection portion to which the duct is connected, and the duct connection portion and the air outlet portion. It has a ventilation part.

According to a fifth aspect, in the fourth aspect, a connection casing is provided between the ventilation portion of the ventilation casing and the air outlet.

A sixth means is the fifth means, wherein a variable air flow damper is provided inside the connection casing.

According to the sixth means, in the fifth means, the air flow rate of the conditioned air from the air outlet can be changed by the variable air flow damper to adjust the air conditioning capacity.

A seventh means is the fourth means, wherein a damper member having a built-in variable air volume damper is interposed between the duct connection portion of the ventilation casing and the duct.

According to the seventh means, in the fourth means, the air-conditioning capacity can be adjusted by changing the amount of air-conditioned air blown out of the outlet through the variable air-volume damper. The height (depth) of the ventilation casing from the outlet can be reduced compared to the case where a variable air flow damper is provided in the connection casing as in
It is possible to further improve the degree of freedom of installation on the blowing section side.

According to an eighth aspect, in the first aspect, the ventilation casing is made of a material mainly composed of glass wool.

According to the eighth means, in any one of the first to seventh means, it is advantageous in making the ventilation casing non-flammable, light in weight and low in cost.

According to a ninth means, in any one of the first to eighth means, the duct is branched into a plurality of tubes at an intermediate portion thereof.

According to the ninth means, unlike one of the first to eighth means, in which the entire duct is constituted by a single duct, the air-conditioning air can be supplied without increasing the diameter of the duct. A higher air conditioning capacity can be obtained by increasing the air volume.

[0024]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 7 are views showing an embodiment of a duct type air conditioner according to the present invention. Note that, in the embodiment of the present invention shown in FIGS.
The same components as those of the conventional example shown in FIGS. 8 and 9 are denoted by the same reference numerals and described.

[First Embodiment] First, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2, the duct type air conditioner includes an air conditioner body (not shown), an air outlet A for blowing conditioned air from the air conditioner body into a room, and an air conditioner with the air outlet A. And a duct 7 having a circular cross section for connecting to the machine body. FIG. 1 shows a vertical cross section when the blowout section A is installed on the indoor ceiling side, and shows a horizontal cross section when the blowout section A is installed on the indoor wall surface side (the same applies to FIG. 3 described later).

The outlet A has an outlet 1 in which an outlet 1a is formed, and a ventilation casing 2 for guiding conditioned air to the outlet 1. The duct 7 can be connected to the ventilation casing 2 from two directions that are substantially orthogonal to the direction in which the conditioned air is blown out from the outlet 1 (the direction of arrow F).

More specifically, the ventilation casing 2 has a substantially cylindrical duct connecting portion 2a, and the axis of the duct connecting portion 2a is substantially perpendicular to the direction F in which the conditioned air is blown from the outlet 1. It has become. At both left and right ends of the duct connecting portion 2a, both end connecting portions 4 and 4 for connecting the duct 7 in the axial direction of the duct connecting portion 2a are formed. In this case, the connection part 4 to which the duct 7 is not connected is closed by the connection part closing lid 4a.

Further, the ventilation casing 2 has a substantially rectangular parallelepiped ventilation portion 2b connecting the side surface of the central portion of the duct connection portion 2a and the air outlet portion 1, and between the air ventilation portion 2b and the air outlet portion 1. A connection casing (slate portion) 5 is interposed in the housing. A rotary plate-shaped variable air volume damper 3 is provided inside the connection casing 5.

It is preferable that the ventilation casing 2 is made of a material mainly composed of glass wool in order to reduce incombustibility, weight and cost.

Next, the operation and effect of this embodiment having the above configuration will be described. According to the present embodiment, the duct 7 can be connected to the ventilation casing 2 of the blowout section A from two directions substantially orthogonal to the blowout direction F of the conditioned air from the blowout section 1. When connecting the ducts 7 extending in the directions substantially orthogonal to each other, there is no need to bend the ducts on the side of the blowout portion or to use an elbow or a chamber. In addition, the height (depth) c of the entire blowout portion A can be reduced as compared with the case where the ventilation casing extends along the direction in which the conditioned air is blown out from the blowout portion 1 as in the related art (c < b <a (see FIGS. 1, 8 and 9).

Therefore, it is possible to avoid a decrease in the air conditioning capacity due to a pressure loss due to the bending of the duct 7, an increase in cost due to the use of an elbow or a chamber, and a complicated installation operation. In addition, it is possible to reduce the possibility that the house needs to be partially remodeled due to restrictions such as the height (depth) c of the entire blowout portion and the bending radius of the duct 7.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. This embodiment differs from the first embodiment in that a damper member 6 is provided in place of the connection casing 5 in the blow-out portion A1, as shown in FIGS. This is the same as the first embodiment shown in FIG.

More specifically, in the blowout section A1 of the present embodiment, the variable airflow damper 3 of the first embodiment is used.
In place of the connection casing 5 having a built-in, a cylindrical damper member 6 having a built-in disc-shaped variable air volume damper 3 ′ is interposed between the both ends connecting portion 4 of the connecting portion 2 a and the end of the duct 7. ing.

According to the present embodiment, the air volume variable damper 3 '
Thus, the height (depth) d of the entire blowout portion A1 can be further reduced as compared with the first embodiment (d <c (see FIGS. 1 and 3) while maintaining the function of adjusting the air conditioning capacity. )), The degree of freedom of installation on the side of the blowout portion A1 can be further improved.

[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to FIG. In this embodiment,
As shown in FIG. 5, the second connection point 2 a of the ventilation casing 2 is capable of connecting a plurality of types of ducts 7 and 17 having different cross-sectional shapes in the blowout section A2.
Unlike the third embodiment, the other configuration is the same as that of the second embodiment shown in FIGS. 3 and 4.

More specifically, in the outlet portion A2 of the present embodiment, a side surface connecting portion 14 for connecting a duct 17 having a rectangular cross-sectional shape is formed on one side surface of the duct connecting portion 2a of the ventilation casing 2. Have been. When the duct 17 is not connected, the side connection portion 14 is closed by the side connection portion closing cover 14a.

In place of such a side surface connection portion 14 (or on the side surface of the duct connection portion 2a opposite to the side surface connection portion 14), a duct having another cross-sectional shape such as an elliptical shape is connected. A side connection portion that can be provided may be provided.

Next, the operation and effect of this embodiment having the above configuration will be described. According to the present embodiment, it is possible to simultaneously or selectively connect a plurality of types of ducts having different cross-sectional shapes while maintaining the same operation and effect as the above-described second embodiment. The degree of freedom in installation and selection of the type of duct can be improved.

[Fourth Embodiment] Next, a fourth embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 6, in the present embodiment, between the air conditioner main body B and the outlets A to A2 (see the first to third embodiments), the intermediate portion of the duct 27 has two The branching duct 36 branches off.

That is, in FIG. 6, a relatively short main body side duct 32 connected to the air conditioner main body B,
The upstream side of the parallel branch ducts 36 is the Y joint 3
4a. Further, a relatively short outlet duct 38 connected to the outlets A to A2 and a downstream side of the two parallel branch ducts 36 form a Y joint 34b.
Connected by In addition, the main body side duct 32, the parallel branch duct 36, and the outlet side duct 38 include:
A circular cross section is used.

Next, the operation and effect of this embodiment having the above configuration will be described. According to the present embodiment, unlike the case where the entire duct 7 is configured by one circular cross-section duct, it is possible to increase the airflow of the conditioned air and increase the air-conditioning capacity without increasing the diameter of the duct. .
That is, as shown in FIG. 7, compared with the case where the air volume is increased by one circular duct 46 having a large diameter,
The height (depth) e required for installing the duct 27 can be kept small (e <f), and the installation place of the duct 27 can be less restricted.

Here, as a specific example, two ducts of 100 mm diameter and one duct of 125 mm diameter are used.
Let's compare the magnitude of pressure loss that leads to a decrease in air volume. According to Darcy Weisbach's equation, λ is the friction coefficient, L is the duct length, d is the duct inner diameter, v is the average flow velocity, and ρ is the air density, and the pressure loss ΔP
Is a ΔP = λ · (L / d ) · (v 2/2) · ρ. Therefore, when two ducts having an inner diameter d ₁ = 100 mm are used, the pressure loss is ΔP 1, and the duct 1 having an inner diameter d ₂ = 125 mm is used.
If the pressure loss when the present and ΔP2, ΔP1: ΔP2 = (v 1 2 / d 1) :( v 2 2 / d 2) where, if the flow rate Q is equal, v ₁ = (Q / ^{_{2) / (πd 1 2/}} 4), v 2 = Q / (π
because it is ^{_{d 2 2/4), ΔP1}} : ΔP2 = (v 1 2 / d 1) :( v 2 2 / d 2) = (1 / 4d 1 5) :( 1 / d 2 5) = d 2 ^{_{5: 4d 1 5 = 125 5}} : 4 × 100 5 = 3.05: 4 = 0.763: 1 with a pressure loss ΔP1 when the two ducts inside diameter d ₁ = 100 mm, the inner diameter d ₂ = It can be seen that the pressure loss ΔP2 for a single 125 mm duct can be suppressed to about 76%.

From the above equation, for the same flow rate Q, in order to suppress the pressure loss to be equal to the pressure loss ΔP1 in the case of two ducts having an inner diameter of 100 mm with one duct,
It is understood that it is necessary to use a duct having an inner diameter of about 132 mm (the calculation is omitted).

It is preferable to use duct members having the same diameter for the main body side duct 32, the parallel branch duct 36, and the outlet side duct 38 in order to facilitate product management and on-site work.

[0045]

According to the first to eighth aspects of the present invention, the duct can be connected to the ventilation casing of the blow-out portion from a direction substantially perpendicular to the direction in which the conditioned air is blown from the blow-out portion. Therefore, there is no need to bend the duct or use an elbow or a chamber on the side of the blowout part even when connecting ducts extending in a direction substantially orthogonal to these. Also,
The height (depth) of the entire outlet can be reduced as compared with the conventional case where the ventilation casing extends in the direction in which the conditioned air is blown from the outlet. For this reason, it is possible to avoid a decrease in air conditioning capacity due to a pressure loss due to the bending of the duct, an increase in cost due to the use of an elbow or a chamber, and a complicated installation operation. In addition, it is possible to reduce the possibility that the house needs to be partially remodeled due to restrictions such as the height (depth) of the entire blowing portion and the bending radius of the duct.

According to the ninth aspect of the present invention, in the invention according to any one of the first to eighth aspects, the entire duct is provided with one duct.
Unlike the case where the duct is formed by the number of ducts, the airflow of the conditioned air can be increased without increasing the diameter of the duct, so that a higher air conditioning capacity can be obtained. For this reason, the height (depth) required for installation of the duct can be suppressed smaller than in the case where the air volume is increased by one duct, and the installation location of the duct can be less restricted.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view (horizontal cross-sectional view) showing the vicinity of an outlet in a first embodiment of a duct type air conditioner according to the present invention.

FIG. 2 is a central cross-sectional view of a blow-out portion of the duct type air conditioner shown in FIG.

FIG. 3 is a vertical cross-sectional view (horizontal cross-sectional view) showing the vicinity of an air outlet in a second embodiment of the duct-type air conditioner according to the present invention.

FIG. 4 is a horizontal sectional view showing the vicinity of a damper member of the duct type air conditioner shown in FIG. 3;

FIG. 5 is a perspective view showing the vicinity of an outlet in a third embodiment of the duct type air conditioner according to the present invention.

FIG. 6 is a schematic plan view showing a duct structure in a fourth embodiment of the duct type air conditioner according to the present invention.

FIG. 7 is a schematic cross-sectional view of the duct structure shown in FIG.

FIG. 8 is a vertical cross-sectional view (horizontal cross-sectional view) showing the vicinity of an outlet of a conventional duct type air conditioner.

FIG. 9 is a vertical cross-sectional view (horizontal cross-sectional view) showing the periphery of an outlet of another conventional duct type air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blow-out part 2 Ventilation casing 2a Duct connection part 2b Ventilation part 3,3 'Air volume variable damper 4 Both ends connection part 5 Connection casing 6 Damper member 7,17,27 Duct 36 Parallel branch duct A, A1, A2 Blow-out part B Air Harmonizer body

Claims (9)

[Claims] 1. A duct comprising: an air conditioner main body; an air outlet for blowing conditioned air from the air conditioner main body into a room; and a duct connecting the air outlet to the air conditioner main body. In the air conditioner, the outlet includes an outlet, and a ventilation casing for guiding conditioned air to the outlet. For the ventilation casing of the outlet, the duct includes:
A duct type air conditioner, wherein the duct type air conditioner is connected from a direction substantially orthogonal to a direction in which the conditioned air is blown out from the outlet. 2. The ventilation casing of the blow-out portion, wherein the duct is connectable from a plurality of directions substantially orthogonal to a blow-out direction of conditioned air from the blow-out portion. The duct type air conditioner described. 3. The duct type air conditioner according to claim 1, wherein a plurality of types of ducts having different cross-sectional shapes can be connected to the ventilation casing of the blow-out portion. 4. The ventilation casing according to claim 1, wherein the ventilation casing has a duct connection portion to which the duct is connected, and a ventilation portion connecting the duct connection portion and the air outlet portion. The duct type air conditioner according to any one of the above. 5. A duct type air conditioner according to claim 4, wherein a connection casing is interposed between the ventilation section of said ventilation casing and said air outlet section. 6. A duct type air conditioner according to claim 5, wherein a variable air flow damper is provided inside said connection casing. 7. A duct type air conditioner according to claim 4, wherein a damper member having a built-in variable air volume damper is interposed between the duct connecting portion of the ventilation casing and the duct. . 8. A duct type air conditioner according to claim 1, wherein said ventilation casing is made of a material mainly composed of glass wool. 9. A duct type air conditioner according to claim 1, wherein said duct is branched into a plurality of ducts at an intermediate portion thereof.